Files
wasmtime/crates/wasi-common/src/error.rs
Jakub Konka 95c2addf15 Compile wasi-common to Emscripten (#688)
* Compile wasi-common to Emscripten

This commit enables cross-compiling of `wasi-common` to Emscripten. To achieve
this, this commit does quite a bit reshuffling in the existing codebase. Namely,
* rename `linux` modules in `wasi-common` and `yanix` to `linux_like` -- this is
  needed so that we can separate out logic specific to Linux and Emscripten out
* tweak `dir` module in `yanix` to support Emscripten -- in particular, the main
  change involves `SeekLoc::from_raw` which has to be now host-specific, and is now
  fallible
* tweak `filetime` so that in Emscripten we never check for existence of `utimensat`
  at runtime since we are guaranteed for it to exist by design
* since `utimes` and `futimes` are not present in Emscripten, move them into a separate
  module, `utimesat`, and tag it cfg-non-emscripten only
* finally, `to_timespec` is now fallible since on Emscripten we have to cast number of
  seconds, `FileTime::seconds` from `i64` to `libc::c_long` which resolves to `i32`
  unlike on other nixes

* Fix macos build

* Verify wasi-common compiles to Emscripten

This commit adds `emscripten` job to Github Actions which installs
`wasm32-unknown-emscripten` target, and builds `wasi-common` crate.

* Use #[path] to cherry-pick mods for Emscripten

This commit effectively reverses the reorg introduced in 145f4a5
in that it ditches `linux_like` mod for separate mods `linux` and
`emscripten` which are now on the same crate level, and instead,
pulls in common bits from `linux` using the `#[path = ..]` proc
macro.
2019-12-11 16:25:13 -08:00

291 lines
11 KiB
Rust

// Due to https://github.com/rust-lang/rust/issues/64247
#![allow(clippy::use_self)]
use crate::wasi;
use std::convert::Infallible;
use std::num::TryFromIntError;
use std::{ffi, fmt, str};
use thiserror::Error;
#[derive(Clone, Copy, Debug, Error, Eq, PartialEq)]
#[repr(u16)]
pub enum WasiError {
ESUCCESS = wasi::__WASI_ERRNO_SUCCESS,
E2BIG = wasi::__WASI_ERRNO_2BIG,
EACCES = wasi::__WASI_ERRNO_ACCES,
EADDRINUSE = wasi::__WASI_ERRNO_ADDRINUSE,
EADDRNOTAVAIL = wasi::__WASI_ERRNO_ADDRNOTAVAIL,
EAFNOSUPPORT = wasi::__WASI_ERRNO_AFNOSUPPORT,
EAGAIN = wasi::__WASI_ERRNO_AGAIN,
EALREADY = wasi::__WASI_ERRNO_ALREADY,
EBADF = wasi::__WASI_ERRNO_BADF,
EBADMSG = wasi::__WASI_ERRNO_BADMSG,
EBUSY = wasi::__WASI_ERRNO_BUSY,
ECANCELED = wasi::__WASI_ERRNO_CANCELED,
ECHILD = wasi::__WASI_ERRNO_CHILD,
ECONNABORTED = wasi::__WASI_ERRNO_CONNABORTED,
ECONNREFUSED = wasi::__WASI_ERRNO_CONNREFUSED,
ECONNRESET = wasi::__WASI_ERRNO_CONNRESET,
EDEADLK = wasi::__WASI_ERRNO_DEADLK,
EDESTADDRREQ = wasi::__WASI_ERRNO_DESTADDRREQ,
EDOM = wasi::__WASI_ERRNO_DOM,
EDQUOT = wasi::__WASI_ERRNO_DQUOT,
EEXIST = wasi::__WASI_ERRNO_EXIST,
EFAULT = wasi::__WASI_ERRNO_FAULT,
EFBIG = wasi::__WASI_ERRNO_FBIG,
EHOSTUNREACH = wasi::__WASI_ERRNO_HOSTUNREACH,
EIDRM = wasi::__WASI_ERRNO_IDRM,
EILSEQ = wasi::__WASI_ERRNO_ILSEQ,
EINPROGRESS = wasi::__WASI_ERRNO_INPROGRESS,
EINTR = wasi::__WASI_ERRNO_INTR,
EINVAL = wasi::__WASI_ERRNO_INVAL,
EIO = wasi::__WASI_ERRNO_IO,
EISCONN = wasi::__WASI_ERRNO_ISCONN,
EISDIR = wasi::__WASI_ERRNO_ISDIR,
ELOOP = wasi::__WASI_ERRNO_LOOP,
EMFILE = wasi::__WASI_ERRNO_MFILE,
EMLINK = wasi::__WASI_ERRNO_MLINK,
EMSGSIZE = wasi::__WASI_ERRNO_MSGSIZE,
EMULTIHOP = wasi::__WASI_ERRNO_MULTIHOP,
ENAMETOOLONG = wasi::__WASI_ERRNO_NAMETOOLONG,
ENETDOWN = wasi::__WASI_ERRNO_NETDOWN,
ENETRESET = wasi::__WASI_ERRNO_NETRESET,
ENETUNREACH = wasi::__WASI_ERRNO_NETUNREACH,
ENFILE = wasi::__WASI_ERRNO_NFILE,
ENOBUFS = wasi::__WASI_ERRNO_NOBUFS,
ENODEV = wasi::__WASI_ERRNO_NODEV,
ENOENT = wasi::__WASI_ERRNO_NOENT,
ENOEXEC = wasi::__WASI_ERRNO_NOEXEC,
ENOLCK = wasi::__WASI_ERRNO_NOLCK,
ENOLINK = wasi::__WASI_ERRNO_NOLINK,
ENOMEM = wasi::__WASI_ERRNO_NOMEM,
ENOMSG = wasi::__WASI_ERRNO_NOMSG,
ENOPROTOOPT = wasi::__WASI_ERRNO_NOPROTOOPT,
ENOSPC = wasi::__WASI_ERRNO_NOSPC,
ENOSYS = wasi::__WASI_ERRNO_NOSYS,
ENOTCONN = wasi::__WASI_ERRNO_NOTCONN,
ENOTDIR = wasi::__WASI_ERRNO_NOTDIR,
ENOTEMPTY = wasi::__WASI_ERRNO_NOTEMPTY,
ENOTRECOVERABLE = wasi::__WASI_ERRNO_NOTRECOVERABLE,
ENOTSOCK = wasi::__WASI_ERRNO_NOTSOCK,
ENOTSUP = wasi::__WASI_ERRNO_NOTSUP,
ENOTTY = wasi::__WASI_ERRNO_NOTTY,
ENXIO = wasi::__WASI_ERRNO_NXIO,
EOVERFLOW = wasi::__WASI_ERRNO_OVERFLOW,
EOWNERDEAD = wasi::__WASI_ERRNO_OWNERDEAD,
EPERM = wasi::__WASI_ERRNO_PERM,
EPIPE = wasi::__WASI_ERRNO_PIPE,
EPROTO = wasi::__WASI_ERRNO_PROTO,
EPROTONOSUPPORT = wasi::__WASI_ERRNO_PROTONOSUPPORT,
EPROTOTYPE = wasi::__WASI_ERRNO_PROTOTYPE,
ERANGE = wasi::__WASI_ERRNO_RANGE,
EROFS = wasi::__WASI_ERRNO_ROFS,
ESPIPE = wasi::__WASI_ERRNO_SPIPE,
ESRCH = wasi::__WASI_ERRNO_SRCH,
ESTALE = wasi::__WASI_ERRNO_STALE,
ETIMEDOUT = wasi::__WASI_ERRNO_TIMEDOUT,
ETXTBSY = wasi::__WASI_ERRNO_TXTBSY,
EXDEV = wasi::__WASI_ERRNO_XDEV,
ENOTCAPABLE = wasi::__WASI_ERRNO_NOTCAPABLE,
}
impl WasiError {
pub fn as_raw_errno(self) -> wasi::__wasi_errno_t {
self as wasi::__wasi_errno_t
}
}
impl fmt::Display for WasiError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
_ => write!(f, "{:?}", self),
}
}
}
#[derive(Debug, Error)]
pub enum Error {
Wasi(WasiError),
Io(std::io::Error),
#[cfg(unix)]
Nix(yanix::YanixError),
#[cfg(windows)]
Win(winx::winerror::WinError),
}
impl From<WasiError> for Error {
fn from(err: WasiError) -> Self {
Self::Wasi(err)
}
}
#[cfg(unix)]
impl From<yanix::YanixError> for Error {
fn from(err: yanix::YanixError) -> Self {
Self::Nix(err)
}
}
impl From<std::io::Error> for Error {
fn from(err: std::io::Error) -> Self {
Self::Io(err)
}
}
impl From<TryFromIntError> for Error {
fn from(_: TryFromIntError) -> Self {
Self::Wasi(WasiError::EOVERFLOW)
}
}
impl From<Infallible> for Error {
fn from(_: Infallible) -> Self {
unreachable!()
}
}
impl From<str::Utf8Error> for Error {
fn from(_: str::Utf8Error) -> Self {
Self::Wasi(WasiError::EILSEQ)
}
}
impl From<ffi::NulError> for Error {
fn from(_: ffi::NulError) -> Self {
Self::Wasi(WasiError::EILSEQ)
}
}
impl From<&ffi::NulError> for Error {
fn from(_: &ffi::NulError) -> Self {
Self::Wasi(WasiError::EILSEQ)
}
}
#[cfg(windows)]
impl From<winx::winerror::WinError> for Error {
fn from(err: winx::winerror::WinError) -> Self {
Self::Win(err)
}
}
impl Error {
pub(crate) fn as_wasi_errno(&self) -> wasi::__wasi_errno_t {
match self {
Self::Wasi(no) => no.as_raw_errno(),
Self::Io(e) => errno_from_ioerror(e.to_owned()),
#[cfg(unix)]
Self::Nix(err) => {
use yanix::YanixError::*;
let err = match err {
Errno(errno) => crate::sys::host_impl::errno_from_nix(*errno),
NulError(err) => err.into(),
TryFromIntError(err) => (*err).into(),
};
err.as_wasi_errno()
}
#[cfg(windows)]
Self::Win(err) => crate::sys::host_impl::errno_from_win(*err),
}
}
pub const ESUCCESS: Self = Error::Wasi(WasiError::ESUCCESS);
pub const E2BIG: Self = Error::Wasi(WasiError::E2BIG);
pub const EACCES: Self = Error::Wasi(WasiError::EACCES);
pub const EADDRINUSE: Self = Error::Wasi(WasiError::EADDRINUSE);
pub const EADDRNOTAVAIL: Self = Error::Wasi(WasiError::EADDRNOTAVAIL);
pub const EAFNOSUPPORT: Self = Error::Wasi(WasiError::EAFNOSUPPORT);
pub const EAGAIN: Self = Error::Wasi(WasiError::EAGAIN);
pub const EALREADY: Self = Error::Wasi(WasiError::EALREADY);
pub const EBADF: Self = Error::Wasi(WasiError::EBADF);
pub const EBADMSG: Self = Error::Wasi(WasiError::EBADMSG);
pub const EBUSY: Self = Error::Wasi(WasiError::EBUSY);
pub const ECANCELED: Self = Error::Wasi(WasiError::ECANCELED);
pub const ECHILD: Self = Error::Wasi(WasiError::ECHILD);
pub const ECONNABORTED: Self = Error::Wasi(WasiError::ECONNABORTED);
pub const ECONNREFUSED: Self = Error::Wasi(WasiError::ECONNREFUSED);
pub const ECONNRESET: Self = Error::Wasi(WasiError::ECONNRESET);
pub const EDEADLK: Self = Error::Wasi(WasiError::EDEADLK);
pub const EDESTADDRREQ: Self = Error::Wasi(WasiError::EDESTADDRREQ);
pub const EDOM: Self = Error::Wasi(WasiError::EDOM);
pub const EDQUOT: Self = Error::Wasi(WasiError::EDQUOT);
pub const EEXIST: Self = Error::Wasi(WasiError::EEXIST);
pub const EFAULT: Self = Error::Wasi(WasiError::EFAULT);
pub const EFBIG: Self = Error::Wasi(WasiError::EFBIG);
pub const EHOSTUNREACH: Self = Error::Wasi(WasiError::EHOSTUNREACH);
pub const EIDRM: Self = Error::Wasi(WasiError::EIDRM);
pub const EILSEQ: Self = Error::Wasi(WasiError::EILSEQ);
pub const EINPROGRESS: Self = Error::Wasi(WasiError::EINPROGRESS);
pub const EINTR: Self = Error::Wasi(WasiError::EINTR);
pub const EINVAL: Self = Error::Wasi(WasiError::EINVAL);
pub const EIO: Self = Error::Wasi(WasiError::EIO);
pub const EISCONN: Self = Error::Wasi(WasiError::EISCONN);
pub const EISDIR: Self = Error::Wasi(WasiError::EISDIR);
pub const ELOOP: Self = Error::Wasi(WasiError::ELOOP);
pub const EMFILE: Self = Error::Wasi(WasiError::EMFILE);
pub const EMLINK: Self = Error::Wasi(WasiError::EMLINK);
pub const EMSGSIZE: Self = Error::Wasi(WasiError::EMSGSIZE);
pub const EMULTIHOP: Self = Error::Wasi(WasiError::EMULTIHOP);
pub const ENAMETOOLONG: Self = Error::Wasi(WasiError::ENAMETOOLONG);
pub const ENETDOWN: Self = Error::Wasi(WasiError::ENETDOWN);
pub const ENETRESET: Self = Error::Wasi(WasiError::ENETRESET);
pub const ENETUNREACH: Self = Error::Wasi(WasiError::ENETUNREACH);
pub const ENFILE: Self = Error::Wasi(WasiError::ENFILE);
pub const ENOBUFS: Self = Error::Wasi(WasiError::ENOBUFS);
pub const ENODEV: Self = Error::Wasi(WasiError::ENODEV);
pub const ENOENT: Self = Error::Wasi(WasiError::ENOENT);
pub const ENOEXEC: Self = Error::Wasi(WasiError::ENOEXEC);
pub const ENOLCK: Self = Error::Wasi(WasiError::ENOLCK);
pub const ENOLINK: Self = Error::Wasi(WasiError::ENOLINK);
pub const ENOMEM: Self = Error::Wasi(WasiError::ENOMEM);
pub const ENOMSG: Self = Error::Wasi(WasiError::ENOMSG);
pub const ENOPROTOOPT: Self = Error::Wasi(WasiError::ENOPROTOOPT);
pub const ENOSPC: Self = Error::Wasi(WasiError::ENOSPC);
pub const ENOSYS: Self = Error::Wasi(WasiError::ENOSYS);
pub const ENOTCONN: Self = Error::Wasi(WasiError::ENOTCONN);
pub const ENOTDIR: Self = Error::Wasi(WasiError::ENOTDIR);
pub const ENOTEMPTY: Self = Error::Wasi(WasiError::ENOTEMPTY);
pub const ENOTRECOVERABLE: Self = Error::Wasi(WasiError::ENOTRECOVERABLE);
pub const ENOTSOCK: Self = Error::Wasi(WasiError::ENOTSOCK);
pub const ENOTSUP: Self = Error::Wasi(WasiError::ENOTSUP);
pub const ENOTTY: Self = Error::Wasi(WasiError::ENOTTY);
pub const ENXIO: Self = Error::Wasi(WasiError::ENXIO);
pub const EOVERFLOW: Self = Error::Wasi(WasiError::EOVERFLOW);
pub const EOWNERDEAD: Self = Error::Wasi(WasiError::EOWNERDEAD);
pub const EPERM: Self = Error::Wasi(WasiError::EPERM);
pub const EPIPE: Self = Error::Wasi(WasiError::EPIPE);
pub const EPROTO: Self = Error::Wasi(WasiError::EPROTO);
pub const EPROTONOSUPPORT: Self = Error::Wasi(WasiError::EPROTONOSUPPORT);
pub const EPROTOTYPE: Self = Error::Wasi(WasiError::EPROTOTYPE);
pub const ERANGE: Self = Error::Wasi(WasiError::ERANGE);
pub const EROFS: Self = Error::Wasi(WasiError::EROFS);
pub const ESPIPE: Self = Error::Wasi(WasiError::ESPIPE);
pub const ESRCH: Self = Error::Wasi(WasiError::ESRCH);
pub const ESTALE: Self = Error::Wasi(WasiError::ESTALE);
pub const ETIMEDOUT: Self = Error::Wasi(WasiError::ETIMEDOUT);
pub const ETXTBSY: Self = Error::Wasi(WasiError::ETXTBSY);
pub const EXDEV: Self = Error::Wasi(WasiError::EXDEV);
pub const ENOTCAPABLE: Self = Error::Wasi(WasiError::ENOTCAPABLE);
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
Self::Io(e) => e.fmt(f),
Self::Wasi(e) => e.fmt(f),
#[cfg(unix)]
Self::Nix(e) => e.fmt(f),
#[cfg(windows)]
Self::Win(e) => e.fmt(f),
}
}
}
fn errno_from_ioerror(e: &std::io::Error) -> wasi::__wasi_errno_t {
match e.raw_os_error() {
Some(code) => crate::sys::errno_from_host(code),
None => {
log::debug!("Inconvertible OS error: {}", e);
wasi::__WASI_ERRNO_IO
}
}
}